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6.11.4 Copying Deep Structures
The procedures for copying lists (see section Lists) only produce a flat
copy of the input list, and currently Guile does not even contain
procedures for copying vectors.
copy-tree can be used for these
application, as it does not only copy the spine of a list, but also
copies any pairs in the cars of the input lists.
- Scheme Procedure: copy-tree obj
- C Function: scm_copy_tree (obj)
Recursively copy the data tree that is bound to obj, and return the new data structure.
copy-treerecurses down the contents of both pairs and vectors (since both cons cells and vector cells may point to arbitrary objects), and stops recursing when it hits any other object.
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